    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <title>Document</title>
        <style>
            .box{
                width: 400px;
                height: 400px;
                background-color: hotpink;
                border: indianred 100px solid;
            }
        </style>
    </head>
    <body>
        <div class="box"></div>
    </body>
    </html>
    